finding what X is

Question

Leo bought a used car for X dollars. One year later the value of the car was 0.88x. Which expression is another way to describe the change in the value of the car.

 

the choices are....

A) 0.12 decrease

B) 0.88% decrease

C) 12% decrease

D) 88% decrease

Answer 1

1 - 0.88 = 0.12

Now while that may be one of the choices, that doesn't exactly describe what's going on. What we need to convert to a percentage:

0.12 → 12%